MAINTAINERS: add myself as mcf_wdt.c maintainer

Signed-off-by: Angelo Dureghello <angelo@kernel-space.org>
---
Changes for v2:
- none
Changes for v3:
- none
diff --git a/MAINTAINERS b/MAINTAINERS
index 4a24a92..47581cf 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -876,6 +876,7 @@
 T:	git https://source.denx.de/u-boot/custodians/u-boot-coldfire.git
 F:	arch/m68k/
 F:	doc/arch/m68k.rst
+F:	drivers/watchdog/mcf_wdt.c
 
 CYCLIC
 M:	Stefan Roese <sr@denx.de>